This software is part of the GNU Project.

NAME

parallel - build and execute shell command lines from standard input in parallel

DESCRIPTION

GNUparallel is a shell tool for executing jobs concurrently locally or using remote computers. A job is typically a single command or a small script that has to be run for each of the lines in the input. The typical input is a list of files, a list of hosts, a list of users, a list of URLs, or a list of tables.

If you usexargs today you will find GNUparallel very easy to use as GNUparallel is written to have the same options asxargs. If you write loops in shell, you will find GNUparallel may be able to replace most of the loops and make them run faster by running several jobs simultaneously.

GNUparallel makes sure output from the commands is the same output as you would get had you run the commands sequentially. This makes it possible to use output from GNUparallel as input for other programs.

For each line of input GNUparallel will execute command  with the line as arguments. If no command  is given, the line of input is executed. Several lines will be run in parallel. GNUparallel can often be used as a substitute forxargs orcat | bash.

Before looking at the options you may want to check out the examples after the list of options. That will give you an idea of what GNUparallel is capable of.

EXAMPLES

You may want to watch the intro video for a quick introduction:http://www.youtub ... tch?v=OpaiGYxkSuQ

Go through the tutorialhttp://www.gnu.or ... lel_tutorial.html or
see the man page orhttps://www.gnu.o ... rgument-appending
for more examples.

Registration Date: Mon 27 Aug 2007 02:16:53 PM UTC
License:GNU General Public License v3 or later
Development Status: 5 - Production/Stable